Means for facilitating the copying of drawings



Aug. 19 1924.

L. SAARI ET AL MEANS FOR momma-me THE comma ormuwmes Filed .April 12 1923 3 Shuts-Shut 1 a mga E9, 1924. .'l,505,499

- L. SAARI ETAL MEANS 'FOR FACILITATING THE COIYING OF DRAWINGS Filed April 12 1923 3 Sheets-Shoot 2 attain:

Aug; l9 1924.

L. SAARI ET AL MEANS FOR FACILITATING THE COPYING OF DRAWINGS Filed April 12 3 I5 Sheets-Sheet 5 ziiz m'v Jkc/hmrv,

. INVENTORS I I M m ATTORNEYS.

v WITNESSES Patented Aug. 19, 1924.

LEONARD SAARI AND wILL Ar/ JAcKsoN, or surname ARIZONA.

MEANS FOR FACILITATING THE COPYING OF DRAWINGS.

Application filed April 12, 1923. SerialNo. 631,580.

To all whom it may concern Be it known that LEONARD SAARI and WILLIAM JACKSON, citizens of the United .States, residing at Superior, in the county of Final and State of Arizona, have invented certain new and useful Improvements in Means for Facilitating the Copying of Drawings, of which the following is a specification.

This invention has reference to means for facilitating the making of drawings by one who has no skill in the art, and its object is to facilitate the production of a copy of a drawing.

In accordance with the invention, there is provided a structure having terminal por tions which may be separately attached to a table or support on which may be placed a sheet of paper, said terminal portions being connected by elastic bands permitting freedom of movement with the bands stretched, to carry a pencil or marking tool through a devious path and the bands are so arranged as to be under tension and give to the hand of the user so that the pencil may be moved over the paper to follow the lines of the drawing and cause the pencil tomark on the drawing paper in accordance with the pattern.

The invention comprises two I similar hinged frames, each having a fixed portion which may be made fast to the edge part of a table or the like and held in such posi tion by thumb tacks or screws or other fastening devices. The hinged frames have elastic bands secured to them and carried about an indicator adjuster with the pointer thereon to denote the amount of travel of the pencil fastened to'the hinged frames and the elastic bands are made fast to a pencil holder arranged to travel in accordance with movements imparted to the adjuster. Where the elastic bands are made fast to the frames provision is made for taking up slack in the elastic bands in order that a desirable tension may be imparted to such elastic bands to facilitate the movement of the indicator and the participation of the indicator in the movement of the pencil.

When it is desired to use the invention for the copying of drawings the hinged frames are made fast by thumb tacksor other fastening devices to a table or other support with angle extensions grippingthe edge of the board or table.

Between the adjuster and the terminalframes made fast to. the drawing board, table or other underlying structure, there is secured'to the rubber or elastic members ax pencil holder and an adjuster or indicator .having a pointer thereon with clamps carried by the adjuster and table for participating inthe movement of the pencil holder and adjuster so that the dial may be moved by the operator in various directions with each part traversed by the elastic bands capable of being held by gripping devices, and

nane by an elastically constrained pencil holder 7 arranged to mark upon the drawing paper in accordance with movements of the indicator to thereby produce a copy of the drawing upon a sheet of drawing paper and due to the'movements imparted to the pencil by the hand of the operator without conscious participation of the operator in the movements of the marking point.

Provision is made for, adjustment ofthe parts of the structure in following the drawing to be copied and the original drawing may beenlarged or contracted as desired, the tensionv of the rubber or elastic bands being adjustable at will.

The invention will be best understood. from a consideration of the following detailed description taken in connection with the accompanaying drawings forming part of this specification, with the understanding that the invention is not confined to any strict conformity with the showing of the drawings but maybe changed and modified so long as such changes and modifications mark no material departure from the salient features ofthe invention as expressed in the appended claims. In the drawings: Figure 1 is a plan view of the preferred form of'drawing implement;

Figure 2 is a section in the line 2-2 of Figure 1;v

Figure 3 is a longitudinal section through a clamp employed in connection with one of the rubber strips;

Figurex l is a section Flgure l;

Figure 5 on the line tof' is a section through one of the rubber band clips Figure is a side view of a marking point structure used in connection with the structure of Flgure 1;

Figure 7' is a longitudinal section of the structure shown in Figure 6; I

Figure 8 is a plan View similar to the showing of Figure 1 but indicating a some what modified form thereof;

Figure 9 is a side elevation of the pencil I holder of Figure 8;

Figure 10 is a section through the structure of Figure 9 and Figure 11 is an inverted plan view of the structure of Figures 9 and 10.

A pair of frame members 1 of triangular form, have ahinged section 2 at one of the corners thereof, and a laterally extending flange 3 formed on the base portion opposite thehinged sections for engagement over the edges of a drawing board, table or the like. The ends of the hinged sections 2 are formed with a return bend 1 forming the bottom half of the clamping member, the upper half of which is formed by a double portion 5, having a downwardly bent end 6 extending toward the return bend 4. An operating member 7 is provided with a downwardly extending clamp engaging flange 8 adapted to engage the upper surface of the double portion 5, so that in the position shown in Figure 2, the portion 8 of the operating member will force the end 6 toward the return portion 4: for effectively clamping the ends of a rubber band inserted the-rebetween. The operating member '2' is pivotally mounted adjacent the downward projection 8 ma pair ofispaced ears 9 formed on the hinged section 2, and the opposite end of said member is formed with a downwardly projecting stop 10 for engaging the hinged section and limiting the movement of the operating member about its-pivot.

An indicator is provided at 11 formed of a ring member 12 having an indicator point extending inwardly of the center thereof, as indicated at 13, which in use is adapted to be traced over the lines of a drawing placed beneath the indicator. The ring 12 is formed with an overlying semi-circular ring portion 14 connected to the ring 12 by a tongue 15, the end portions of the semicircular part being formed with depending projections 16 formed on a return bend for engagement with diametrically opposite portions of the ring member 12. Adjacent the points of engagement of said depending end 16, the ring member 12 is formed with pairs of upstanding ears 1? having a locking member 18 pivotally mounted there in and provided with a depending extension 19 adapted for engagement with the semicircular portion over the depending exten sion 16 for forcing said extension toward the ring member 12 for securing opposite end portions of a rubber band 20 to said ring; member, the ends of the rubber member being secured to the locking member of one of the movable sections of the frames 1, as clearly indicated in Figure 1 of the drawings. The locking member 18 is of semicircular form, as clearly indicated in Figure 1, and 18 provided lntermediate lts ends with a limiting projection 21 for limiting formed with a hook member 26 at a point opposite the opening for receiving the bight of a rubber band 27, the ends of which extend to andare secured in the locking member of the other frame member 1. The sleeve membe1x22 receives a cooperating sleeve 28 for housing a lead holder 29 movable within said cooperating sleeve and projected toward the concaved end 23, by a spring member 30 connected with a screw 31 threaded into the end of the cooperating section 28 and adapted for operation to increase or decrease the tension on said spring member, the other end of the spring being mounted in a cap member 32 which has a tight fit with the lead holder 29. lVith this structure, it will be seen that a desired tension on the lead may be produced, in order that the desired character of line may be produced on the paper in the use of this device in Figures 8 to 11, a holder for an ordinary form of lead pencil 33 is shown, having a ring shaped base 34: on which is provided an overlying semi-circular locking member 35, having downward projections 36 diametrically opposite points for engagement with the ring member 34, and an operating member 37 of semicircular form pivotally mounted in the cars 38 adjacent the ends of the semi-circular locking member 35, this operating member having projections 39 engaging the locking member for forcing the projection 36 toward the ring member 3%. At a point between the ears 38 on the ring member, the same is formed with an inwardly extending projection passing through the center of the ring where it is formed with an opening 41 for receiving the lead of the pencil 33,

the opposite side of the ring being formed with an outwardly extendingstrip 12, terminating in a vertically extending portion 13 having a pencil holder 6% at the end thereof, adapted to support the pencil 33 in a vertical position with the point extending through the opening ll for contact with the drawing paper beneath the ring. this construction a pair of rubber bands 15' are used the opposite ends being secured in the locking members of the movable frame section of the frames 1 as clearly shown in Figure 8, and the central portions of which are separated and secured by the locking members at opposite sides of the rings 12 and 34.

In the use of this device, the frames 1 are positioned on opposite ends of a table or drawing board with the flanges 3 engaging the ends thereof for holding the frame relative to the ends of said table or board and for tension the rubber bands connecting the same.

Referring particularly to Figure l, a drawing to be traced is placed under the indicator l1, and a sheet of drawing paper is placed under the sleeve 22, the rubber bands 20 and 27 being connected as shown in this figure, after which a movement of the indicator 11, over the drawing, in a manner to have the pointed projection 13 follow the lines of said drawing will produce a corresponding drawing of similar proportions on the drawing paper under the sleeve 22. The frames 1 may be fastened to the table or drawing board by a thumb tack if desired, openings 46 being providedin the frames 1 for this purpose. The indicator 11 may be adjusted relative to the sleeve 22 through the operation of the locking member 18 above described, so that the proportion between the drawing made by the lead pencil and that traced by the indicator may be changed, the rubber bands being also adjustable for increasing or decreas ing the tension thereof as desired during the copying of the drawing.

In the device shown in Figure 8, the in dicator ill and the pencil holder are both adjustable on the band 45 for positioning in any desired relation thereon, which will give a greater range of variation i nthe proportion between the indicator and the pencil holder for making corresponding variations between the drawing being copied and I that being made by the pencil, so that any sized drawing may be reduced in scale or increased in scale as desired.

What is claimed is:

l. A device of the class described, including a'pair of frame members adapted for securing to a suitable support, an elastic connection adjustably secured to said frame members, a marker holder carried by said elastic connection, and an indicator adjust ably mounted on said elastic connection whereby movement of the indicator will move the said pencil holder in proportion thereto.

2. A device of the class described, including a pair of frame members adapted depending tion, said indicator being adapted for movement relative to the frame member for producing a corresponding movement of said pencil holder.

3. A device of the class described including a pair offrame members, an elastic connection between said frame members removably and adjusably secured thereto, a marker holder mounted on said elastic connection, an indicator having a ring shaped base member formed with an indicating projection extending to the central portion thereof, and clamping members adapted for cooperation with said ring member for clamping the elastic connection to said ring member.

4. A'device of the class described including a pair of frame members formed for engagement with and positioning on a suitable support, manually operable clamping members mounted on each of said frame members for removably and adjust-ably clamping elastic members in connection therewith, said elastic members extending between said frame members, a marker holder mounted on said elastic members, an indicator having a ring member formed with an indicating projection extending inwardly to the central portion thereof, and a manually operable clamping member for cooperation with said ring member adapted to adjustably and removably clamp said indicator in connection with one of said elastic members for producing a corresponding movement of the pencil holder in the movement of'the indicator.

5. A device of the class described includ ing a pair of frame members, elastic connections between said frame members, an indicator secured to said elastic connections, and a lead holder connected with said elastic connection including a pair of cooperating sleeve members, one of said members being formed with a lead guiding sleeve, a lead retaining member mounted in said sleeve member and movable-therein, and means for operating the lead retaining member for projecting the lead carried thereby through the lead guiding sleeve.

In testimony whereof we affix our signatures.

LEONARD SAARI. WILLIAM JACKSON. 

